Struct MetadataFilter 

pub struct MetadataFilter { /* private fields */ }

An immutable, composable filter expression over Metadata.

Construct filters with MetadataFilter::builder. An empty builder builds a match-all filter, while structurally invalid expressions such as empty groups are rejected by MetadataFilterBuilder::build.

Implementations

impl MetadataFilter

pub fn builder() -> MetadataFilterBuilder

Creates a builder for a metadata filter.

pub fn all() -> Self

Creates a filter that matches every metadata object.

pub fn none() -> Self

Creates a filter that matches no metadata object.

pub fn options(&self) -> FilterMatchOptions

Returns the current match options.

pub fn with_options(self, options: FilterMatchOptions) -> Self

Replaces the current match options and returns a new filter.

pub fn with_missing_key_policy( self, missing_key_policy: MissingKeyPolicy, ) -> Self

Returns a new filter with the supplied missing-key policy.

pub fn with_number_comparison_policy( self, number_comparison_policy: NumberComparisonPolicy, ) -> Self

Returns a new filter with the supplied number-comparison policy.

pub fn not(self) -> Self

Returns a new filter that negates this filter.

pub fn matches(&self, meta: &Metadata) -> bool

Returns true if meta satisfies this filter.

pub fn matches_with_options( &self, meta: &Metadata, options: FilterMatchOptions, ) -> bool

Returns true if meta satisfies this filter with explicit options.

Trait Implementations

impl Clone for MetadataFilter

fn clone(&self) -> MetadataFilter

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MetadataFilter

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for MetadataFilter

fn default() -> MetadataFilter

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MetadataFilter

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Not for MetadataFilter

type Output = MetadataFilter

The resulting type after applying the ! operator.

fn not(self) -> Self::Output

Performs the unary ! operation.

impl PartialEq for MetadataFilter

fn eq(&self, other: &MetadataFilter) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for MetadataFilter

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MetadataFilter